Sahih Muslim , Book 13, Hadith 37 (In-Book) ⓘ
The son of Abu Bakra reported it on the authority of his father that the Messenger of Allah had said: The two months of 'Id, Ramadan and Dhu'l-Hijja (are not incomplete).
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ أَخْبَرَنَا يَزِيدُ بْنُ زُرَيْعٍ، عَنْ خَالِدٍ، عَنْ عَبْدِ الرَّحْمَنِ، بْنِ أَبِي بَكْرَةَ عَنْ أَبِيهِ، - رضى الله عنه - عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " شَهْرَا عِيدٍ لاَ يَنْقُصَانِ رَمَضَانُ وَذُو الْحِجَّةِ " .
also referenced under: Hadith 1089 (Reference) & Book 6, Hadith 2394 (USC-MSA)